CN102725502B

CN102725502B - The control device of internal combustion engine and control method

Info

Publication number: CN102725502B
Application number: CN201180007268.2A
Authority: CN
Inventors: 清水博和
Original assignee: Hitachi Automotive Systems Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2010-01-28
Filing date: 2011-01-28
Publication date: 2016-05-25
Anticipated expiration: 2031-01-28
Also published as: JP5165705B2; US20120303251A1; US9133776B2; JP2011153586A; CN102725502A; WO2011093462A1

Abstract

The present invention relates to diagnosis and whether normally carried out the control device that rotates and reverse differentiation and the control method of internal combustion engine. In detail, make crankshaft angle sensor according to pulsewidth (WIPOS) difference in the time that bent axle rotates and reverse of the rotating signal (POS) of the per unit angle output of bent axle, by instrumentation pulsewidth (WIPOS), differentiate rotating and reverse of bent axle. Then, according to the differentiation rotating and reverse, upgrade counter (CNTPOS) that rotating signal (POS) is counted, in the time again starting, the value of the counter (CNTPOSz) when stopping is as initial value refresh counter (CNTPOS). Here,, the value of the counter (CNTPOS) in crank shaft angle position definite after starting starts is different from desired value, is diagnosed as the discrimination function rotating and reverse and occurs abnormal.

Description

The control device of internal combustion engine and control method

Technical field

The present invention relates to control device and the control method of internal combustion engine, in detail, relate to the forward of differentiating bent axle with anti-Turn the apparatus and method of crank shaft angle when detection internal combustion engine stops.

Background technology

In the past, be known to the control device of such internal combustion engine: for after starting in starting, start as early as possible fuel spray andLight a fire and the startability of raising internal combustion engine, crank shaft angle when storage internal combustion engine stops, in the time again starting, with what storeCrank shaft angle while stopping is that initial value is estimated crank shaft angle, starts fuel according to this estimation crank shaft angle and sprays and light a fire, andIn the time stopping, internal combustion engine is because stopping after the temporary transient reversion of the pressure in combustion chamber, thereby detects this reversion and detect and stopCrank shaft angle (for example,, with reference to patent documentation 1) only time.

Prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2006-233914 communique

Summary of the invention

The problem that invention will solve

In addition, as differentiating the method rotating and reverse of internal combustion engine, there is such method: output and bent axle are setThe turn-sensitive device (crankshaft angle sensor) of the pulse signal of rotary synchronous, and make the pulsewidth of described pulse signalOr amplitude is according to rotating and reverse and different, compares by instrumentation value and threshold value to pulsewidth and amplitude, differentiation justTurn and reverse.

But, while making forward due to turn-sensitive device or deviation, the degeneration etc. of circuit of processing rotating signal and reversionTime pulsewidth or amplitude produce deviation, the discrimination precision rotating and reverse thus declines, and has the wrong internal combustion engine (song of judgingAxle) the possibility rotating and reverse.

And, produce such problem: because mistake is judged rotating and reverse and wrong detection while stopping before stoppingCrank shaft angle, the crank shaft angle after starting according to the information estimator starting of this wrong stop position, according to this estimation knotWhen fruit is controlled fuel injection and igniting, mistake cylinder and set fuel injection and igniting, produce the different of after-burning, tempering etc.Normal burning, or exhaust proterties and startability are worsened.

The present invention completes in view of above-mentioned problem just, the object of this invention is to provide whether one is diagnosable normally entersGo the control device of the internal combustion engine that rotates and reverse differentiation of internal combustion engine (bent axle).

For solving the means of problem

For this reason, the present invention differentiates the rotating and reverse of bent axle of internal combustion engine, rotates and reverse and differentiates result and detect according to thisCrank shaft angle when internal combustion engine stops, taking detect stop time crank shaft angle open as the starting of internal combustion engine described in base estimationCrank shaft angle after beginning, the estimated value of the crank shaft angle during by detection reference crank shaft angle after the starting of described internal combustion engine starts withDescribed benchmark crank shaft angle compares, and judges that described forward reversion judgement unit has or not extremely.

Invention effect

According to foregoing invention, the diagnosable differentiation that rotates and reverse of whether normally having carried out internal combustion engine (bent axle), can be byPrevent in the first place according to fuel injection and the igniting etc. of wrong differentiation output control internal combustion engine.

Brief description of the drawings

Fig. 1 is the system construction drawing of the internal combustion engine in embodiment.

Fig. 2 is the figure that the structure of crankshaft angle sensor in embodiment and cam sensor is shown.

Fig. 3 is the sequential chart that the output characteristics of crankshaft angle sensor in embodiment and cam sensor is shown.

Fig. 4 be illustrate rotating signal in embodiment by rotating and reverse the different of the pulsewidth that causes and amplitudeSequential chart.

Fig. 5 is the sequential chart that the increase and decrease of the counter cnt POS in embodiment is shown, is (A) to be illustrated inThe sequential chart of the variation while correctly detecting reversion, (B) is the sequential chart that is illustrated in the variation while not detecting reversion.

Fig. 6 is illustrated in embodiment based on correct fuel while rotating and reverse again the starting of differentiation to spraySequential chart with IGNITION CONTROL.

Fig. 7 be illustrated in embodiment that fuel while differentiating again starting when wrong sprays rotating and reverse andThe sequential chart of IGNITION CONTROL.

Fig. 8 be the Check processing that the crank shaft angle in embodiment is shown, the differentiation processing rotating and reverse and forward andThe flow chart of the diagnostic process that reversion is differentiated.

Fig. 9 be the Check processing that the crank shaft angle in embodiment is shown, the differentiation processing rotating and reverse and forward andThe flow chart of the diagnostic process that reversion is differentiated.

Figure 10 illustrates that fuel that rotating and reverse in embodiment differentiated when abnormal sprays and the flow process of IGNITION CONTROLFigure.

Figure 11 is the sequential chart that the diagnostic process that rotates and reverse differentiation in embodiment is shown.

Figure 12 illustrates that fuel that rotating and reverse in embodiment differentiated when abnormal sprays and the flow process of IGNITION CONTROLFigure.

Detailed description of the invention

Below, describe with reference to the accompanying drawings an embodiment of the invention in detail.

Fig. 1 is the structure chart of applying the internal combustion engine for vehicle 101 of the control device the present invention relates to. In addition, in this realityExecute in mode, internal combustion engine 101 is 4 cylinder 4 stroke IC engines in upright arrangement.

In Fig. 1, in the air inlet pipe 102 of internal combustion engine 101, be fitted with electronic control throttle 103, Electronic ControlAir throttle 103 utilizes throttle motor 103a to carry out driven for opening and closing to air throttle 103b.

And internal combustion engine 101, via electronic control throttle 103 and inlet valve 105, arrives each cylinder by air intakeCombustion chamber 106 in.

Air inlet 130 at each cylinder is provided with Fuelinjection nozzle 131, and Fuelinjection nozzle 131 is according to from as controlThe ejection pulse signal of the ECU (control unit of engine) 114 of device carries out valve opening action, burner oil.

Fuel in combustion chamber 106 carries out ignition by the spark ignition of spark plug 104. At each spark plugIgnition module 112 is installed in 104, and ignition module 112 is built-in with ignition coil and controls leading to this ignition coilThe power transistor of electricity.

Burning gases in combustion chamber 106 flow out to blast pipe 111 via exhaust valve 107. Be located in blast pipe 111Front catalyst 108 and rear catalyst 109 exhaust of the blast pipe 111 of flowing through is purified.

Admission cam shaft 134, exhaust cam shaft 110 have cam integratedly, make inlet valve 105 Hes by this camExhaust valve 107 moves.

In addition, inlet valve 105 and/or exhaust valve 107 can have variable valve actuator for air, and this variable valve actuator for air makesAt least one party in valve timing, maximum valve lift amount, valve operating angle is variable.

ECU114 is built-in with microcomputer, carries out computing according to pre-stored program in memory, controls electronicsControl air throttle 103, Fuelinjection nozzle 131, ignition module 112 etc.

ECU114 input is from the detection signal of various sensors. As various sensors, be provided with: detect throttle and step onThe accelerator open degree sensor 116 of aperture (accelerator open degree) ACC of plate 116a, the suction sky of detection internal combustion engine 101The airflow sensor 115 of tolerance Q, pulse is exported in the rotation that is bent axle 120 according to the output shaft of internal combustion engine 101The crankshaft angle sensor (turn-sensitive device) 117 of rotating signal (the unit crank shaft angle signal) POS of shape, detects jointThe throttle sensor 118 of the aperture TVO of valve 103b, detects the temperature T W's of the cooling water of internal combustion engine 101Cooling-water temperature sensor 119, cam signal PHASE protruding of exporting pulse type according to the rotation of admission cam shaft 134Wheel sensor 133, steps on the brake switch 122 of connecting under the on-position of brake pedal 121 the driver of vehicle,Detect the vehicle speed sensor 123 of travel speed (speed of a motor vehicle) VSP of the vehicle taking internal combustion engine 101 as power source, etc.

And, the running of ECU114 input internal combustion engine 101 and the main switch stopping be ignition switch 124 connection andCut-off signal and firing switch 125 switch on and off signal.

Fig. 2 illustrates the structure of crankshaft angle sensor 117 and cam sensor 133.

Crankshaft angle sensor 117 is made up of signal plate 152 and rotation detecting 153, and signal plate 152 is by bent axle120 axle supportings, have the jut 151 as detected portion around, and rotation detecting 153 is fixed on internal combustion engine101 sides, detect jut 151 and output rotating signal POS.

Rotation detecting 153 has the various treatment circuits, the Yi Jijian that comprise Waveform generating circuit, selection circuit etc.The pick-up of surveying jut 151, the rotating signal POS that rotation detecting 153 is exported is made up of train of pulsePulse signal, normally low level of this train of pulse is changed within a certain period of time in the time detecting described jut 151High level.

The jut 151 of signal plate 152 is that the spacing of spending with crank shaft angle 10 uniformly-spaced forms, and will make jut 151The part that consecutive miss is 2 is arranged on 2 the relative positions of pivot that clip bent axle 120.

In addition, the disappearance number of jut 151 can be 1, also starts consecutive miss more than 3.

According to said structure, as shown in Figure 3, what crankshaft angle sensor 117 (rotation detecting 153) was exported revolvesRotaring signal POS with crank shaft angle every 10 degree (unit crank shaft angle) is continuous be changed to high level 16 times after, at 30 degreeKeep during this time low level, be again changed to high level continuous 16 times.

Therefore, spending output crank shaft angle, interval 30 degree with crank shaft angle 180 is (hypodontia region, disappearance portion between low periodPoint) after initial rotating signal POS, this crank shaft angle 180 degree are equivalent to 4 cylinder internal-combustion engines of present embodimentIn other words stroke phase difference between the cylinder in 101 is igniting interval.

And in the present embodiment, crankshaft angle sensor 117 is configured to, in the before upper dead canter 50 of each cylinderPiston position output crank shaft angle 30 degree of degree (BTDC50 degree) be between low period after (hypodontia region) initialRotating signal POS.

On the other hand, cam sensor 133 is made up of signal plate 158 and rotation detecting 159, signal plate 158End axis by admission cam shaft 134 supports, and has the jut 157 as detected portion around, and rotation detects dressPut 159 and be fixed on internal combustion engine 101 sides, detect jut 157 and output cam signal PHASE.

Rotation detecting 159 has the various treatment circuits that comprise waveform shaping circuit etc. and detects jut157 pick-up.

The jut 157 of signal plate 158 is provided with respectively 1,3,4 at 4 positions of every 90 degree of cam angleIndividual, 2, in the part that is provided with continuously multiple juts 157, be crank shaft angle 30 by the spacing setting of jut 157Degree (cam angle 15 is spent).

And, as shown in Figure 3, the cam signal PHASE of cam sensor 133 (rotation detecting 159) outputThe pulse signal being formed by train of pulse, normally low level of this train of pulse, in the time detecting described jut 157In certain hour, be changed to high level, with every 90 degree of cam angle, every 180 independent 1, continuous 3 of the degree of crank shaft angle,Continuous 4, continuous 2 are changed to high level.

And spending interval with crank shaft angle 180, to export cam signal PHASE and the continuous wave output of independent 1 manyThe beginning signal of individual cam signal PHASE, and, at the top dead centre TDC of certain cylinder and next cylinderBetween top dead centre TDC, export respectively the output pattern of independent 1, continuous 3, continuous 4, continuous 2.

In more detail, the compression top center TDC setting at the 1st cylinder and the compression top center TDC of the 3rd cylinderBetween, 3 cam signal PHASE of continuous wave output, at the compression top center TDC of the 3rd cylinder and the 4th cylinderBetween compression top center TDC, 4 cam signal PHASE of continuous wave output, at the compression top center of the 4th cylinderBetween the compression top center TDC of TDC and the 2nd cylinder, 2 cam signal PHASE of continuous wave output, the 2ndBetween the compression top center TDC of the compression top center TDC of cylinder and the 1st cylinder, export separately 1 cam signalPHASE。

In addition, have by making rotatable phase variable the make inlet valve of admission cam shaft 134 with respect to bent axle 120In the situation of the variable valve actuator for air of 105 air valve correct-timing variable, even if change valve timing, cam signal PHASEOutgoing position can crosscut top dead centre TDC and change yet.

In other words, the changing range of valve timing is estimated at the outgoing position of interior setting cam signal PHASE andOutput gap, even if make to change valve timing, the cam signal PHASE exporting between each top dead centre TDCQuantity also can not change.

The continuous wave output number of the cam signal PHASE exporting between each top dead centre TDC represents to become subsequently compressionThe cylinder numbers of top dead centre, for example, between this top dead centre TDC and the top dead centre TDC of last time, defeated continuouslyGo out in the situation of 3 cam signal PHASE, this top dead centre TDC represent be in the compression of the 3rd cylinder onlyPoint TDC.

In 4 cylinder internal-combustion engines 101 of present embodiment, according to the 1st cylinder → 4th, cylinder → 3rd cylinder → theThe order of 2 cylinders is lighted a fire, thereby as shown in Figure 3, the cam signal PHASE exporting between top dead centre TDCOutput pattern set according to the order of independent 1, continuous 3, continuous 4, continuous 2.

ECU114 for example changes and waits the hypodontia position that judges rotating signal POS according to the cycle of rotating signal POS,Taking this hypodontia position as benchmark, the generation number of rotating signal POS is counted, thereby detected top dead centre TDC (baseAccurate crank shaft angle position REF). In the present embodiment, the 6th output behind the hypodontia region of rotating signal POSRotating signal POS is equivalent to the top dead centre TDC of each cylinder.

Then, ECU114 counts by the output number to cam signal PHASE between top dead centre TDC,Differentiate with the position of back piston and become the cylinder of compression top center TDC (predetermined piston position), and to from upperThe generation number of the rotating signal POS of stop TDC is counted, and detects now according to this count value CNTPOSCrank shaft angle.

In the time detecting the cylinder of compression top center TDC and crank shaft angle, ECU114 determines to carry out fuel injection and pointCylinder and fuel injection timing and the ignition timing of fire, according to what detect according to described count value CNTPOSAngle (crank shaft angle) output ejection pulse signal and the ignition control signal of bent axle 120.

The differentiation result that the position of piston becomes the cylinder of compression top center TDC (predetermined piston position) is according to pointFire order is upgraded, thereby counts by the output number to cam signal PHASE between top dead centre TDCNumber, differentiation can be pressed after becoming the cylinder of compression top center TDC (predetermined piston position) with the position of back pistonUpgrade the cylinder of compression top center TDC at each top dead centre TDC according to ignition order.

In addition, the interval that the generation number of cam signal PHASE is counted is not limited between top dead centre TDC,Can be interval using what crank shaft angle (piston position) was counted as the generation number to cam signal PHASE arbitrarilyBenchmark.

And, can be according to the pulsewidth of cam signal PHASE not equal, differentiate the cylinder of predetermined piston position,Utilize the generation number of cam signal PHASE to differentiate the cylinder of predetermined piston position to replace.

And, in the present embodiment, can be by making the part disappearance of train of pulse of rotating signal POS, to lackThe unsceptered angle position (crank shaft angle) that is set to benchmaring bent axle 120, but do not make every 10 degree of rotating signal POSDisappearance ground is exported, and replaces, and the benchmark crank shaft angle position that also can be arranged on every 180 degree of crank shaft angle produces letterNumber reference position sensor, taking the output signal of this reference position sensor as benchmark, to rotating signal, POS entersRow is counted, and detects thus the angle position (crank shaft angle) of bent axle 120.

In addition, the in the situation that of internal combustion engine 101 (bent axle 120) forward, the generation of rotating signal POS represents bent axle120 rotate 10 degree toward the forward direction, from the generation number of the rotating signal POS of benchmark crank shaft angle position represent fromThe anglec of rotation of the bent axle 120 of benchmark crank shaft angle position.

But before internal combustion engine 101 stops, internal combustion engine 101 (bent axle 120) is because the compression in cylinder is pressed sometimesPower etc. and reversing, when in this reversion, the same continuation counted the generation number of rotating signal POS during with forward,Angle position (crank shaft angle) that can wrong detection bent axle 120.

Therefore, crankshaft angle sensor 117 (rotation detecting 153) in the time of the forward of bent axle 120 and when reversion defeatedGo out the rotating signal POS (pulse signal) that pulsewidth is different, to just can differentiate internal combustion engine 101 (bent axle 120)Turn and reverse (with reference to Fig. 4 (A)).

As the method that produces the pulse signal that pulsewidth is different according to the direction of rotation of rotating shaft, use for example TOHKEMYThe disclosed method of 2001-165951 communique. Specifically, as the detection of the jut 151 of signal plate 152Pulse signal, produces 2 signals that phase place staggers mutually, by these signals being compared to judge forward and anti-Turn, select to be generated as 2 pulse signals of mutually different pulsewidth WIPOS according to the result of determination rotating and reverseIn any one and by its output.

In ECU114, the pulsewidth WIPOS of rotating signal POS is carried out to instrumentation, to the instrumentation value WIPOS of pulsewidthWith the discrimination threshold rotating and reverse be that threshold value SL compares, the pulsewidth WIPOS of judgement while being forward is also thusPulsewidth WIPOS while being reversion, differentiating bent axle 120 is forward or reversion.

When pulsewidth WIPOS when the threshold value SL using in the differentiation rotating and reverse is configured to forward and reversionPulsewidth WIPOS median (for example, 55 μ s～80 μ s), at the pulsewidth WIPOS in when reversion during than forwardIn the present embodiment of pulsewidth WIPOS length, if pulsewidth WIPOS is more than described threshold value SL, be judged as YESInverted status, if pulsewidth WIPOS is less than described threshold value SL, is judged as YES forward state.

In addition, in the present embodiment, as shown in Fig. 4 (A), the pulsewidth WIPOS during by forward is set as45 μ s, the pulsewidth WIPOS during by reversion is set as 90 μ s, but be not limited to, pulsewidth WIPOS is set asThe 45 μ s, the 90 μ s that state. And, the pulsewidth WIPOS when pulsewidth WIPOS ratio can also be set as forward time reversesGreatly.

And, in the example shown in (A) of Fig. 4, rotating signal POS is set as to normally low level, whenWhile reaching set angle position, be changed within a certain period of time the pulse signal of high level, but can be also normallyHigh level is changed within a certain period of time low level pulse signal, in this situation in the time reaching set angle positionUnder, can set between low period by direction of rotation difference, the length between instrumentation low period is as pulsewidth WIPOSDifferentiate direction of rotation.

And as shown in Fig. 4 (B), the amplitude (signal level) of rotating signal POS is by rotating and reverse notWith, can differentiate and rotate and reverse according to the difference of amplitude (signal level).

In the example shown in (B) of Fig. 4, rotating signal POS is low level normally, when reaching set angle, be changed within a certain period of time the pulse signal of high level, the letter while setting the angle position that reaches set for when degree the positionNumber level is high during than reversion in the time of forward, specifically, sets the signal of exporting 5V in the time of forward for, in the time of reversionThe signal of output 2.5V.

Then, as shown in Fig. 5 (A), in the time of bent axle 120 forward, by each generation rotating signal POSShi Zeng great count value CNTPOS, detects bent axle 120 anglec of rotation toward the forward direction, in the time that bent axle 120 reverses, logicalCross for the generation of rotating signal POS and reduce described count value CNTPOS, bent axle 120 reverses, correspondingly,The anglec of rotation towards direction of rotation reduces.

In addition, as shown in Figure 5, clamp count value CNTPOS that hypodontia part makes rotating signal POS step by stepBe varied to " 10 " and " 13 ", this is rotating signal POS's when making count value CNTPOS represent there is no hypodontiaProduce the processing of number.

And, in reversion and crosscut top dead centre TDC in the situation that, as shown in Fig. 5 (A), be scheduled to by makingThe differentiation result of the cylinder of piston position is got back to previous cylinder by ignition order, detects in the time that internal combustion engine 101 stopsThe piston position of each cylinder.

In the figure shown in (A) of Fig. 5, according to the 1st cylinder → 3rd, cylinder → 4th, cylinder → 3rd cylinderThe order of the → the 4 cylinder, the more cylinder data of new subscription piston position, but this represents such state: in processInternal combustion engine 101 reverses after the top dead centre TDC of the 3rd cylinder, again the top dead centre TDC of crosscut the 3rd cylinder and returningReturn, between the top dead centre TDC of the 1st cylinder and the top dead centre of the 3rd cylinder, be switched to forward from reversion, crosscut theThe top dead centre TDC of 3 cylinders and stopping.

As mentioned above, in the situation that differentiation rotates and reverse and detects crank shaft angle, even sometimes at internal combustion engine 101Reversion before stopping, the piston position of the each cylinder when also can detecting accurately the crank shaft angle while stopping and stopping.

Then,, in the stopping period of internal combustion engine 101, having differentiation if pre-stored is to be the position of rest of bent axle 120Put and the cylinder of predetermined piston position, in the time that internal combustion engine 101 starts again, suppose that bent axle 120 is when stoppingCrank shaft angle is that initial position is rotated, and can in the time that starting starts, estimate crank shaft angle, and, can determine pre-fixed piston positionThe cylinder of putting, can start as early as possible fuel and spray and light a fire and improvement starting response.

When crank shaft angle in the time of unclear stopping, starting from starting to initial detection reference crank shaft angle position (rotation letterThe disappearance part of number POS) during, do not know crank shaft angle, and, the 2nd secondary standard crank shaft angle position can be detectedDifferentiate the cylinder of predetermined piston position, thereby before detecting the 2nd secondary standard crank shaft angle position, can not determine to fireThe cylinder that material sprays and lights a fire, fuel sprays and igniting starts to postpone.

In the present embodiment, ECU114 has such idle stop control function: idle when at internal combustion engine 101When automatically stop condition is set up under speed operating condition, automatically stop internal combustion engine 101, when automatically stop internal combustion engine 101 itWhen rear starting conditions is set up again, cranking internal combustion engine 101 again automatically.

Then, by idle stop control from halted state is started again, require the high dynamic response that rises, thereby asThe above, pre-stored have crank shaft angle in the time stopping and a cylinder of predetermined piston position, if using them as initiallyValue is estimated the cylinder of crank shaft angle and predetermined piston position, according to rotating signal POS and cam signal PHASEThe cylinder that detects crank shaft angle and predetermined piston position starts fuel before and sprays and light a fire, and can obtain the high dynamic response that risesProperty.

In described idle stop control, for example, vehicle velocity V SP is 0km/h, and internal combustion engine rotary speed NE is predeterminedBelow rotary speed, accelerator open degree ACC full cut-off, brake switch 122 is connected (on-position), cooling water temperatureWhen TW all sets up with first-class condition at predetermined temperature, be judged as idling-stopping condition (stop condition automatically) and set up,Stop fuel and spray and light a fire, automatically stop internal combustion engine 101.

Described predetermined rotary speed is the value of the idle state for judging internal combustion engine 101, is set to such an extent that compare targetIdling rotary speed is slightly high, and described predetermined temperature is for complete warm state at internal combustion engine 101 (after warming-upState) the self-braking value of lower permission.

On the other hand, automatically stopping under the state of internal combustion engine 101, for example, it is (non-that brake switch 122 is switched to disconnectionOn-position), or the pedal of stepping on the throttle, or the Duration Ratio of automatic stop condition is long fiducial time, orWhile judging cell voltage decline, be judged as again starting conditions and set up, again start the fuel spray of combustion motor 101Penetrate and light a fire.

In addition, by idle stop control from halted state is started again, in the present embodiment, use startingMotor makes internal combustion engine 101 start rotation.

Fig. 6 illustrates such situation: be stored in the crank shaft angle (count value CNTPOS) of internal combustion engine 101 while stopping andThe cylinder of predetermined piston position sprays and igniting according to these storage Data Control fuel in the time again starting.

At the example shown in Fig. 6, before the compression top center of the 1st cylinder, internal combustion engine 101 stops, and, while stoppingCrank shaft angle position be the position of front 50 degree (BTDC50 degree) of the compression top center of the 1st cylinder.

Data during from above-mentioned stopping know, in the suction stroke way of the 3rd cylinder, and in the exhaust of the 4th cylinderIn stroke way, internal combustion engine 101 stops, thereby ECU114 follows starting to start, to stop in suction stroke way theThe 4th cylinder stopping in 3 cylinders and instroke way is implemented fuel and is sprayed, and arranges the 3rd cylinder and the 4th cylinderIgniting.

And, while producing rotating signal POS when following starting to start, to the value when stopping as initial valueNumerical value CNTPOS increases progressively counting, detects the compression top center of the 1st cylinder according to the result that increases progressively counting, whenWhile detecting the compression top center of the 1st cylinder, be the 3rd by the Data Update of the cylinder that becomes subsequently compression top centerCylinder, and at top dead center position, count value CNTPOS is reset to 0, making can be according to count value CNTPOSEstimate the anglec of rotation of after top dead center, determine to start timing etc. for the energising of ignition coil according to count value CNTPOS.

Dividing to the toothless portion) that detects rotating signal POS from starting starts, the value while stopping with the running of last timeFor datum renewal count value CNTPOS, estimate thus crank shaft angle now, when detecting lacking of rotating signal POSWhen toothed portion, be independent of the estimated result of the storage data when stopping, the crank shaft angle being defined as is nowATDC130 degree (BTDC50 degree), afterwards, by determining that taking this position is as datum renewal count value CNTPOS,Detect crank shaft angle.

And, when initial detection toothless portion) assigns to determine when crank shaft angle, according to determining the rotating signal of position from thisThe count value of POS, detects the top dead centre of the 2nd time, according to the top dead centre of the 1st time and upper the stopping of the 2nd time after startingThe quantity of the cam signal PHASE exporting between point, determines the cylinder before compression top center.

In addition, the CYL in Fig. 6 represents the numbering of the cylinder before compression top center, and CYL1 represents protrudingThe quantity of wheel signal PHASE is counted and the cylinder that detects, each piston position when CYL2 represents to stopThe result estimating for the cylinder of benchmark before as compression top center.

In the case of starting after determining the cylinder before crank shaft angle and compression top center fuel injection and igniting, at Fig. 6In shown example, determining when cylinder the #1 cylinder in instroke way and become air inlet row after cylinder is determinedThe 2nd cylinder of journey is the cylinder that can carry out at first fuel injection, and according to crank shaft angle and each piston position when stoppingThe estimated value that is set to benchmark starts the situation that fuel sprays to be compared, and fuel sprays and igniting starts to postpone, and rises under dynamic responseFall.

In addition, as mentioned above, rotating and reverse of bent axle 120 judges it is by the pulsewidth to rotating signal POSWIPOS and threshold value SL compare and carry out, but the instrumentation value root of the pulsewidth WIPOS of rotating signal POSAccording to the output bias of crankshaft angle sensor 117 (rotation detecting 153) and instrumentation pulsewidth WIPOSThe circuit deviations of ECU114 etc. and changing, thus, exist and rotate and reverse the possibility that discrimination precision declines.

And, when reality reversion and mistake while being judged to be forward, crank shaft angle when wrong detection stops and pre-fixed piston positionThe cylinder of putting, when the cylinder of the crank shaft angle position when stopping and predetermined piston position is after base estimation starting startsWhen the cylinder of crank shaft angle and predetermined piston position, the fuel while again starting according to this estimated value control sprays and igniting,Cause carrying out fuel injection and igniting at wrong cylinder and timing.

Fig. 5 (B) illustrates and can not detect reversion, the count value be also judged as YES forward state in reversion timeThe differentiation result of the cylinder before variation and the compression top center of CNTPOS.

As shown in Fig. 5 (B), when being inverted status and false judgment when being forward, although be inverted status,Also make the count value CNTPOS of the anglec of rotation that represents after top dead center change increase, thereby the detection top dead centre that leads to errorsCylinder before position and false judgment compression top center.

And, in the time of false judgment stop position, as shown in Figure 7, by again rising taking stop position as base estimationCrank shaft angle after moving and the cylinder before compression top center, cause wrong cylinder to carry out fuel injection and igniting, producesThe abnormal combustion of tempering etc.

Fig. 7 illustrates such situation: in fact before the compression top center of the 1st cylinder, internal combustion engine 101 stops and can notDetect reversion, thereby wrong detection is that internal combustion engine 101 stops before the compression top center of the 3rd cylinder.

Before the compression top center of the 3rd cylinder, the 4th cylinder is in suction stroke way, and the 2nd cylinder is in exhaustIn stroke way, thereby in the example shown in Fig. 7, according to internal combustion engine 101 before the compression top center of the 3rd cylinderThe storage stopping is carried out fuel injection to the 4th cylinder and the 2nd cylinder in the time again starting, but in fact,Before the compression top center of 1 cylinder, internal combustion engine 101 stops, and the 4th cylinder that has carried out fuel injection is actually exhaust rowJourney, causes carrying out the igniting to the 4th cylinder at suction stroke, the abnormal combustion of generation tempering etc.

As mentioned above, there is the stop position of internal combustion engine 101 if pre-stored, estimate after starting according to this storing valueThe cylinder of crank shaft angle and predetermined piston position, sprays and igniting according to this estimated result control fuel, although can be as early as possibleBeginning fuel sprays and igniting, improves starting response, still can not differentiate accurately occurred before stopping anti-While turning, the detection of stop position produces error, and result, causes, in the time again starting, wrong cylinder is carried out to fuel sprayPenetrate and light a fire, causing exhaust proterties deterioration while again starting etc.

Therefore, whether ECU114 diagnosis has normally carried out the differentiation that rotates and reverse based on rotating signal POS, according toThe detection of this diagnostic result march shaft angle, sprays and igniting according to the crank shaft angle control fuel detecting.

Below, according to the flow chart of Fig. 8 and Fig. 9 describe in detail the crank shaft angle of being undertaken by ECU114 Check processing,Rotate and reverse to differentiate and process and rotate and reverse the situation of the diagnostic process of differentiation.

Routine shown in the flow chart of Fig. 8 and Fig. 9 be in the time that crankshaft angle sensor 117 is exported rotating signal POS inThe disconnected routine of carrying out.

First, in step S501, as exported the rotating signal POS of rotating signal POS to this from last timeTime, the generation cycle T POS of instrumentation rotating signal POS, and, this rotating signal POS of instrumentationPulsewidth WIPOS.

In next step S502, judge whether counting beginning label FCNT is set with initial value " 0 ".

In the situation that counting beginning label FCNT is set with " 0 ", enter step S503, differentiate this rotation letterWhether number POS is that starting starts rear initial rotating signal POS.

In the case of being initial rotating signal POS, enter step S504, judge whether to store when in last timeThe value of the count value counter cnt POSz of the rotating signal POS of expression crank shaft angle when combustion machine 101 stops.

The value of counter cnt POSz in the time that storage does not stop, do not know which angle at bent axle 120This rotating signal POS is exported in degree position, thereby enters step S513, is judged to be not know crank shaft angle.

During not knowing crank shaft angle, can not determine that fuel sprays and the timing of igniting, thereby do not start fuel injectionWith igniting but wait for.

On the other hand, the value of the counter cnt POSz in the time storing that last time, internal combustion engine 101 stopped,The position being estimated as while stopping from this starts starting, enters step S505, the counter while stopping turning round last timeThe value of CNTPOSz is set as the initial value of counter cnt POS.

Then,, by counter cnt POS is carried out to initial setting, while producing rotating signal POS, upgrade meter at every turnNumber device CNTPOS, can detect crank shaft angle now according to the value of counter cnt POS, thereby enter stepS506, by counting beginning label FCNT is set as to 1, permits refresh counter CNTPOS.

And, in next step S507, judge that whether the value of counter cnt POS when last time running stops is“10”。

CNTPOS=10 is the value representing with the rotating signal POS of BTDC80 degree output, and BTDC80 degree is scarceThe outgoing position of rotating signal POS before toothed portion.

Therefore, the value of the counter cnt POSz in the time stopping is that " 10 ", at rotating signal, POS becomesIn the angular regions of hypodontia, internal combustion engine 101 stops, and can be estimated as internal combustion engine 101 in the starting again of actuating motorThe rotating signal POS of this of forward generation is the rotating signal POS after hypodontia region.

Therefore, the value of the counter cnt POSz in the time that last time, running stopped is " 10 ", enters stepS508, sets counter cnt POS " 13 " that represent hypodontia region rotating signal POS afterwards.

The in the situation that counter cnt POS=13 exporting rotating signal POS not being carried out to hypodontia, represent quiteThe 13rd rotating signal POS after top dead centre TDC, in other words, expression is the crank shaft angle position of ATDC130 degreePut.

On the other hand, the value of the counter cnt POSz in the time that last time, running stopped is not " 10 ", entersStep S516, the value of the counter cnt POSz while making to stop turning round last time is set as the counter of initial valueCNTPOS increases 1.

In addition, when the upper sub-value CNTPOSz in step S516 produces first rotating signal POS after starting starts,Being the value of counter cnt POSz when last time, running stopped, after the 2nd time, is the value of upgrading last time.

Then,, in next step S517, judge that the value of the counter cnt POS increasing is in step S516No is " 18 ", in the situation that being not CNTPOS=18, directly finishes this routine.

On the other hand, the in the situation that of CNTPOS=18, enter step S518, by the value of counter cnt POSReset to 0, and, in next step S519, output reference crank shaft angle signal REF.

Counter cnt POS=0 is equivalent to the top dead centre tdc position of each cylinder, at output reference crank shaft angle signalDuring REF, that is, during top dead centre TDC, the generation number of cam signal PHASE is counted, sentencedThe cylinder of other compression top center.

As mentioned above, counter cnt POS is reset to 0 at the top dead centre TDC of each cylinder, by counterCNTPOS is made as taking 10 degree as unit representation from the value of the top dead centre TDC anglec of rotation toward the forward direction.

The in the situation that of counting beginning label FCNT being set to 1 in step S506, produce rotating signal POS in next timeTime, enter step S514 from step S502, in the value of not storing the last time running counter cnt POSz while stoppingSituation under, counting beginning label FCNT remains 0, thereby in the time that produce rotating signal POS next time, from stepRapid S502 enters step S503, by being judged as and not being first in step S503, enters step S509.

In addition, carry out the processing of the value of storing the counter cnt POSz while stopping that turns round, can be defined in and pass through idlingStop controlling the situation that automatically stops internal combustion engine 101. This be because, by idle stop control from halted state fromIn moving starting again, high while requiring starting response ratio to pass through driver's key switch operation starting, and, passing throughIn the situation of driver's key switch operation starting, crank shaft angle is likely in the middle variation that stops of internal combustion engine, while stoppingCrank shaft angle position different with the crank shaft angle position of starting before starting, if the crank shaft angle when stopping being estimated startingCrank shaft angle after beginning, likely carries out mistake and estimates.

In step S509, undertaken by upper sub-value and this sub-value of the generation cycle T POS to rotating signal POSRelatively, judge whether this rotating signal POS is equivalent to the initial rotating signal POS behind hypodontia region.

Produce cycle T POS and sharply increase at the hypodontia position of the interval output rotating signal POS spending with crank shaft angle 30,Thereby in the case of having the large cycle variation of the variation that exceedes the cycle T POS being caused by the variation of rotary speed,The cycle T PSO that can be judged as this be instrumentation become 30 degree intervals part (hypodontia part) after result.

Then, be equivalent to the situation of the initial rotating signal POS behind hypodontia region at this rotating signal POSUnder, detect before upper dead canter 50 according to rotating signal POS and spend the position of (BTDC50 degree), in this case, enterTo step S510, counter cnt POS is set to " 13 " corresponding with ATDC130 degree (BTDC50 degree).

In next step S511, to counting beginning label, FCNT sets 1, and, in step S512, rightCrank shaft angle determines that flag F DEC sets 1.

Described crank shaft angle determines that the value of counter cnt POSz when flag F DEC stops according to turning round last time is to countingBeginning label FCNT sets 1, in the situation that starting refresh counter CNTPOS, keeps initial value 0, anotherAspect, not storing the last time running counter cnt POSz while stopping, detects the initial rotation behind hypodontia regionAfter signal POS, start, in the situation of refresh counter CNTPOS, to be set as 1.

The rotating signal POS that is judged as this in step S509 is not equivalent to the initial rotation letter behind hypodontia regionIn the situation of number POS, enter step S513, be judged as and do not know crank shaft angle.

,, in the case of not storing the last time running counter cnt POSz while stopping, detecting behind hypodontia regionInitial rotating signal POS before, the testing result of crank shaft angle is not known in output, when detecting behind hypodontia regionInitial rotating signal POS time, at this time point, can be defined as crank shaft angle is ATDC130 degree (BTDC50 degree),Thereby since refresh counter CNTPOS next time.

Therefore,, in the case of not storing the last time running counter cnt POSz while stopping, detecting tooth deficiency areaBefore initial rotating signal POS behind territory, do not know crank shaft angle, in the initial rotation detecting behind hypodontia regionAfter signal POS, can start fuel and spray and light a fire.

On the other hand, the counter cnt POSz while stopping in the case of storing last time running, by this storing valueBe set as the initial value of counter cnt POS, start immediately refresh counter CNTPOS, thus to turn round last timeCounter cnt POSz while stopping is the crank shaft angle after base estimation starting starts, thereby can start as early as possible fuel sprayPenetrate and light a fire.

In the time that counting beginning label FCNT is set to 1, enter step S514 from step S502, at step S514In, judge whether to produce the halt instruction of internal combustion engine 101, specifically, whether stop fuel and spray and light a fire.

Here, be defined in by idle stop control automatically stop carrying out storage running and stopping time counterIn the situation of the processing of CNTPOSz, described halt instruction can be defined in to automatically stopping by idle stop control.

If do not produce halt instruction, but in the running of internal combustion engine 101 that continues fuel injection and igniting,Enter step S515.

In step S515, S509 is the same with step, by the generation cycle T POS's to rotating signal POSUpper sub-value and this sub-value compare, and whether the rotating signal POS that judges this is equivalent to initial behind hypodontia regionRotating signal POS.

In the case of the initial rotating signal POS after this rotating signal POS is not hypodontia region, enterStep S516, makes the counter cnt POS of last time increase 1 and become this value.

And in step S515, the rotating signal POS that is judged as this is the initial rotation behind hypodontia regionWhen signal POS, enter step S520.

In step S520, judge whether crank shaft angle to be determined to flag F DEC sets 1.

In the situation that crank shaft angle being determined to flag F DEC sets 0, that is, store when internal combustion engine 101 is stoppedCounter cnt POSz, and after starting starts, make counter cnt POS increase progressively the feelings of counting according to this storing valueUnder condition, enter step S521.

In step S521, differentiate the counter cnt POSz with last time, counter when last time, running stoppedCNTPOSz is whether the value that initial value increases progressively after counting is near " 10 ".

In the situation that normally increasing progressively counting counter cnt POS, when exported rotating signal POS before hypodontia regionTime, count up to counter cnt POS=10 owing to increasing progressively, thereby export the initial rotating signal behind hypodontia regionThe time point of POS increase progressively counting counter cnt POS before treatment for the state of " 10 " be normal.

But, under the reversion can not correct decision producing during in the case of the stopping of internal combustion engine 101, counterThe value of CNTPOS does not correspond to the actual crank shaft angle while stopping, if the counter cnt POSz while stopping with thisFor initial value starts the counting that increases progressively of counter cnt POS in the time again starting, will wrong detection starting timeCrank shaft angle.

Here, the hypodontia of rotating signal POS is to produce with certain crank shaft angle, and based on actuating motorUnder crankshaft rotating state, bent axle 120 can not reverse, but continues forward from stop position, thereby at internal combustion engine 101Starting start the rear time point that starts the hypodontia that detects rotating signal POS, determine crank shaft angle.

Therefore, detecting the value of counter cnt POS of time point of hypodontia of rotating signal POS, in other words,Position taking running while stopping is as the estimation crank shaft angle of benchmark is in the situation of corresponding with hypodontia position " 10 ", mistakeThe result of the reversion judgement before stopping is the crank shaft angle of wrong detection while going out to stop, thereby can be judged as to stopTime crank shaft angle be the crank shaft angle that estimates of benchmark and actual crank shaft angle generation deviation.

But, based on rotate and reverse judgement counter cnt POS increase and decrease process in, even correct decisionRotate and reverse, sometimes also because reversion timing of direction of rotation etc. makes the detection of crank shaft angle produce a little error.

Therefore,, in step S521, judge the absolute value of the counter cnt POSz of last time and the difference of expected value 10Whether for example, below feasible value ESL (1～3).

Even described feasible value ESL be according under the state that can correctly rotate and reverse differentiation also as internal combustionThe stop position error of the machine 101 and angle that produces is set, suitably storage in advance, make to sentence when rotating and reverseChan Sheng be not wrong time, the counter cnt POSz of last time and the difference of expected value exceed described feasible value ESL.

Then, exceed described feasible value ESL at the absolute value of the counter cnt POSz of last time and the difference of expected value 10Situation under, can not correctly judge the reversion of internal combustion engine 101 before stopping, thereby wrong detection internal combustion engine 101 stopsTime crank shaft angle, increase progressively counting counter in starting again after starting using this wrong stop position as initial valueCNTPOS also detects crank shaft angle, thereby the toothless portion) timesharing that goes out rotating signal POS when primary detection after starting,The value that is estimated as counter cnt POS is not the value corresponding with hypodontia part.

Therefore, exceed described feasible value ESL at the absolute value of the counter cnt POSz of last time and the difference of expected value 10Situation under, be judged to be the pulsewidth WIPOS based on rotating signal POS bent axle 120 rotate and reverse differentiate produceRaw abnormal, in other words, be can not correct decision inverted status state, enter step S522, warning vehicleDriver produces described abnormal, supervises as early as possible and repairs, and carry out for tackling abnormal control (troubleshooting).

Described abnormal diagnostic result can remain to the counter cnt POSz that is judged as last time in step S521, below feasible value, or can follow in the repairing of engineering repair works and adjust operation with the absolute value of the difference of expected value 10And mandatory replacement.

To described driver's warning, for example, can use near the bright light of the emergency warning lamp 171 waiting the driver's seat that is located at vehicleCarry out, or also can inform and occur extremely to driver by sound guidance etc.

And, as described troubleshooting, can the estimation as the crank shaft angle of initial value according to the crank shaft angle when stoppingAs a result, the decision of prohibition of fuel injection and ignition timing, or forbid idle stop control, details will be explained below.

On the other hand, in step S521, be judged as the exhausted of the counter cnt POSz of last time and the difference of expected value 10To value below feasible value ESL in the situation that, be judged as that to rotate and reverse discrimination function normal, in can correctly judgingReversion before the stopping of combustion machine 101, walks around step S522, enters step S523.

In step S523, according to the detection in this hypodontia region, crank shaft angle is determined to flag F DEC sets 1.

And, in step S524, to the initial rotating signal behind counter cnt POS setting and hypodontia regionThe value " 13 " that POS is corresponding.

And, in step S520, be judged as the in the situation that crank shaft angle being determined to flag F DEC sets " 1 ", that is,Detected in the past hypodontia region last time, the detection in this hypodontia region is after the 2nd time after again starting, and is risingAfter moving, can, taking the hypodontia region of rotating signal POS in the situation of benchmaring crank shaft angle, walk around step S521～stepRapid S523 enters step S524, and counter cnt POS is set to " 13 ".

And the halt instruction of judging generation internal combustion engine 101 in step S514 (produces by idle stop controlThe halt instruction of system) time, enter step S525.

In step S525, the pulsewidth WIPOS to rotating signal POS and threshold value SL compare, if arteries and veinsWide WIPOS, more than threshold value SL, is judged to be bent axle 120 and reverses, if pulsewidth WIPOS is less than threshold value SL,Be judged to be bent axle 120 forwards.

Then, in the time of bent axle 120 forward, enter step S515, repeatedly carry out such processing: each generation revolvedWhen rotaring signal POS, increase progressively counting counter cnt POS, in the time that counter cnt POS reaches " 18 ", reset to " 0 ".

On the other hand, in the time determining bent axle 12 and reverse, enter step S526, judge counter cnt POS'sWhether upper sub-value CNTPOSz is 0.

Then, in the situation that upper sub-value CNTPOSz is not 0, enter step S527, make counter cnt POSValue reduce 1 than upper sub-value CNTPOSz, tackle thus returning of the crank shaft angle that caused by reversion, afterwards direct knotRestraint this routine.

But, in the time entering step S527, in the situation that upper sub-value CNTPOSz is " 13 ", be judged as thisRotating signal POS be the rotating signal POS before hypodontia region, in step S527, by counter cnt POSBe set as " 10 ".

And, if upper sub-value CNTPOSz is not " 0 ", enter step S528, by counter cnt POS'sValue resets to and counter cnt POS is reset to the value " 17 " before 0 in the time of forward.

,, in the time of bent axle 120 forward, counter cnt POS is changed to ... 17 → 0 → 1 → 2 ... → 17 → 0 → ...,Thereby in the time of reversion, make counter cnt POS be changed to " 17 " by step from " 0 ", whenever producing rotating signal POSTime from " 17 " countdown.

In step S529, output reference crank shaft angle signal REF.

Shown in above-mentioned steps S514, step S525～step S529, step S515～step S524, produceWhen halt instruction, judge that rotating and reverse the also processing of refresh counter CNTPOS is equivalent to detect locating of stop positionReason, during stopping internal combustion engine 101 by idle stop control, continues ECU114 to switch on power, ECU114Counter cnt POS after upgrading before stopping is as the data storage maintenance that represents the crank shaft angle while stopping.

In addition, the value of counter cnt POS when internal combustion engine 101 can be stopped is stored in nonvolatile memory.

There is the troubleshooting when abnormal according to the flowchart text of Figure 10 in the differentiation rotating and reverse, below,Concrete contents processing in described step S522.

The flow chart of Figure 10 illustrates the ECU114 routine that (for example 10ms) interrupts execution at regular intervals, first,In step S701, judge that crank shaft angle determines whether flag F DEC is 1.

Crank shaft angle determines that flag F DEC is that 1 situation is such state: after starting, detect rotating signal POSHypodontia region, by the counting (counter cnt POS) of the rotating signal POS taking this hypodontia region as benchmarkCan determine crank shaft angle, thereby enter step S704, determine that according to counter cnt POS fuel sprays and just lights a fireTime, implement fuel and spray and light a fire.

On the other hand, determine that in crank shaft angle flag F DEC is 0, start also not detect hypodontia region from starting, noCan determine in the situation of crank shaft angle, enter step S702.

In step S702, judge whether it is by idle stop control automatically again when cranking internal combustion engine 101.

In the time being the key operated cranking internal combustion engine 101 by driver (while starting by manual operation),With by compared with idle stop control is automatically again when cranking internal combustion engine 101, requiring of starting response is low, though fromCrankshaft rotating starts to wait until the hypodontia region of detection rotating signal POS just starts fuel injection and igniting, also can obtainObtain and start fully response.

Therefore, not being by idle stop control automatically again when cranking internal combustion engine 101, but by driver'sIn situation when key operated cranking internal combustion engine 101, enter step S705, the timing of prohibition of fuel injection and ignitingDetermine.

That is, in the time being the key operated cranking internal combustion engine 101 by driver, after starting, detect rotationThe hypodontia region of signal POS, by the counting (counter of the rotating signal POS taking this hypodontia region as benchmarkCNTPOS) can determine crank shaft angle, in other words, crank shaft angle determines that flag F DEC becomes 1, then at step S704In, determine that according to counter cnt POS fuel sprays and the timing of igniting, implement fuel injection and igniting.

On the other hand, in step S702, be judged as YES by idle stop control cranking internal combustion engine 101 again automaticallyTime situation under, enter step S703.

In step S703, judge the forward of bent axle 120 of the pulsewidth WIPOS based on rotating signal POS and anti-It is normal or abnormal turning differentiation.

Then, in the case of can normally differentiate the rotating and reverse of bent axle 120, can according to rotate and reverse differentiate highCrank shaft angle when detection internal combustion engine 101 in precision ground stops, and, as long as can detect accurately crank shaft angle, just can be justReally detect the cylinder of the predetermined piston position while stopping. Therefore, from starting starts to detecting rotating signal POSHypodontia region between, can the positional information when stopping estimating accurately the gas of crank shaft angle and predetermined piston positionCylinder, can start as early as possible fuel and spray and light a fire, and improves starting response.

Therefore, in step S703, be judged as and can normally differentiate the rotating and reverse of bent axle 120, enterStep S704, thus, according to the crank shaft angle when stopping as initial value estimate the crank shaft angle after starting starts result,And the cylinder of predetermined piston position when stopping is predetermined piston position as benchmark is estimated as after starting startsCylinder carries out fuel injection and igniting from the detection in hypodontia region.

On the other hand, differentiate and have extremely rotating and reverse of bent axle 120, what have that false judgment rotates and reverse canIn the situation of energy property, the accuracy of detection of crank shaft angle when internal combustion engine 101 stops and the cylinder of predetermined piston position declines,When the cylinder of the crank shaft angle when stopping and predetermined piston position is estimated crank shaft angle after starting starts and pre-as initial valueWhen the cylinder of fixed piston position, lead to errors and judge the cylinder of crank shaft angle and predetermined piston position.

Then,, in the time spraying according to the cylinder control fuel of wrong crank shaft angle and predetermined piston position and light a fire, causeCarry out fuel injection and igniting in the timing different from the timing of expection and wrong cylinder, generation abnormal combustion (afterCombustion and tempering etc.), exhaust proterties and startability are worsened.

Therefore, in the case of bent axle 120 rotate and reverse differentiate have abnormal, enter step S705, forbid combustionMaterial sprays and IGNITION CONTROL. Therefore, have abnormal in the situation that rotating and reverse to differentiate, even pass through idle stopControl automatically again when cranking internal combustion engine 101, the same during also with key operated cranking internal combustion engine 101 by driver,Detect afterwards the hypodontia region of rotating signal POS in starting, in definite crank shaft angle and crank shaft angle is determined to flag F DECBe set as before 1, do not enter step S704, determine crank shaft angle, and, by revolving taking hypodontia region as benchmarkThe counting (counter cnt POS) of rotaring signal POS is determined the cylinder of predetermined piston position, implements afterwards fuel sprayPenetrate and light a fire.

Thus, although by idle stop control automatically again fuel when cranking internal combustion engine 101 spray and igniting startsPostpone, starting response declines, but can suppress to carry out fuel injection and igniting due to the cylinder wrong and timing andProduce abnormal combustion.

In addition, in step S703, be judged as rotate and reverse judgement have abnormal and enter step S705 in the situation that,Terminate in the fuel injection and the igniting that are judged as abnormal determined timing before.

Figure 11 is the same with the example shown in Fig. 7, and in fact internal combustion engine 101 before the compression top center of the 1st cylinder is shownStop but can not differentiating reversion, thereby wrong detection is that internal combustion engine 101 stops before the compression top center of the 3rd cylinderIn situation, the situation of the abort process of the abnormal timing that diagnosis reversion is differentiated and the igniting based on this diagnosis.

In the example shown in Figure 11, according to the storage that internal combustion engine 101 stops before the compression top center of the 3rd cylinder,In the time again starting, the 4th cylinder and the 2nd cylinder are carried out to fuel injection, and counter cnt POS when stoppingValue " 6 " be initial value, after starting, make counter cnt POS increase progressively counting.

Here not this in the value of counter cnt POS of time point of the hypodontia part that detects rotating signal POS," 10 " come but " 5 ", thereby can not judge accurately the reversion before stopping, being therefore judged as meter in the time stoppingThe not crank shaft angle of Correct reality of value of number device CNTPOS, judges the abnormal of reversion discrimination function.

Then, due to determine that abnormal time point is that judgement arranges according to wrong stop position for the 4th cylinderBefore ignition timing, thereby end the igniting to the 4th cylinder according to abnormality juding, avoid occurring in suction stroke by pointThe tempering that fire causes.

The abnormal time point that determines described reversion discrimination function is the timing of determining crank shaft angle simultaneously, thereby after this can be highPrecision ground controls that fuel sprays and igniting, in the time that starting starts to the fuel of the 4th cylinder and the 2nd cylinder injection at each gasIgnition in the igniting of the timing before the compression top center of cylinder.

As producing the countermeasure when abnormal rotating and reverse judgement, can adopt following structure: as mentioned above, passing throughWhen idle stop control is started again, forbid crank shaft angle based on when the stopping estimated result as the crank shaft angle of initial valueFuel spray and IGNITION CONTROL, forbid in addition idle stop control.

The flow chart of Figure 12 is illustrated in and rotates and reverse judgement idle stop control occurs to forbid in abnormal situationThe processing of ECU114.

The flow chart of Figure 12 illustrates the ECU114 routine that (for example 10ms) interrupts execution at regular intervals, first,In step S801, judge that crank shaft angle determines whether flag F DEC is 1.

Then, in the situation that crank shaft angle determines that flag F DEC is 1, enter step S802, idling is passed through in judgementWhether stop controlling the condition that automatically stops internal combustion engine 101 sets up.

Here in the case of the condition establishment that automatically stops internal combustion engine 101 by idle stop control, enter step,S803, judges that the differentiation that rotates and reverse of the bent axle 120 of the pulsewidth WIPOS based on rotating signal POS is also normalAbnormal.

In the situation that can normally rotating and reverse judgement, enter step S806, by stop fuel spray andIgniting, stops the running of internal combustion engine 101 automatically.

Here, when before stopping, internal combustion engine 101 reverses, can be high according to the pulsewidth WIPOS of rotating signal POSPrecision ground detects the reversion of bent axle 120, can roughly correctly detect crank shaft angle while stopping and the gas of predetermined piston positionCylinder. Therefore, make internal combustion engine 101 automatically again starting in the situation that, the crank shaft angle when stopping being estimated as initial valueMeter crank shaft angle, and being that the cylinder of predetermined piston position is estimated the gas of predetermined piston position as benchmark in the time stoppingCylinder, before detecting thus the hypodontia region of rotating signal POS, can roughly correctly judge now after starting startsCrank shaft angle and the cylinder of predetermined piston position, can determine accurately fuel spray and ignition timing, start as early as possible combustionMaterial sprays and igniting.

In other words, the crank shaft angle while stopping can be roughly correctly detecting, combustion can be in the time again starting, started as early as possible accordinglyMaterial sprays and igniting, thereby permits automatically stopping internal combustion engine 101 by idle stop control.

On the other hand, rotating and reverse differentiation generation extremely, can not differentiate accurately in situation about rotating and reverse,When before stopping, internal combustion engine 101 reverses, the testing result of the crank shaft angle while stopping producing error.

Therefore, in the case of the differentiation rotating and reverse occur abnormal, when according to the crank shaft angle when stopping for initiallyWhen the crank shaft angle that value estimates determines fuel injection and ignition timing, although fuel sprays and igniting starts early, to depositIn the possibility that produces abnormal combustion, and, when the tooth deficiency area of primary detection rotating signal POS in the time again startingWhile making fuel injection and firing delay before territory, although can suppress the generation of abnormal combustion, fuel sprays and ignitingStart postpone and make to start response worsen.

Therefore, in the case of the differentiation rotating and reverse occur abnormal, even automatically stop by idle stop controlInternal combustion engine 101 conditions are set up, and also enter step S805, continue to implement fuel and spray and light a fire, in automatically not stoppingCombustion machine 101 and continue the running of internal combustion engine 101.

In step S802, be judged as the invalid feelings of condition that automatically stop internal combustion engine 101 by idle stop controlUnder condition, that is, in the situation that requiring to remain in operation internal combustion engine 101, enter step S805, continue to implement fuel sprayPenetrate and light a fire.

And, in step S801, be judged as crank shaft angle and determine the in the situation that flag F DEC being 0, in other words,In the case of be when starting starts to detecting during the hypodontia region of rotating signal POS, enter step S804,Judge whether it is while again starting from the automatic stop condition of internal combustion engine 101 by idle stop control.

Then, if while again starting by idle stop control, enter step S805, carry out based on to stopCrank shaft angle only time and the cylinder of predetermined piston position are the crank shaft angle that estimates of initial value and the gas of predetermined piston positionThe fuel of cylinder sprays and igniting.

Owing to can detecting accurately reversion, can detect accurately thus and under the state of stop position, implement idling and stopOnly control, thereby in the situation that again starting by idle stop control, can be taking stop position as reference, high-accuracyGround estimate starting after crank shaft angle and the cylinder of predetermined piston position, thus, can control accurately fuel spray andIgniting, thereby can be from detecting the hypodontia region of rotating signal POS the cylinder of definite crank shaft angle and predetermined piston positionTime point before carries out fuel injection and igniting.

On the other hand, not being while starting by idle stop control, but when key operated starting by driverSituation under, even if detect the hypodontia part of rotating signal POS, determine the cylinder of crank shaft angle and predetermined piston positionStart afterwards fuel and spray and light a fire, also can obtain the starting response of abundant needs, thereby enter from step S804Step S806, prohibition of fuel injection and igniting, determine the cylinder of crank shaft angle and predetermined piston position, starts afterwards combustionMaterial sprays and igniting.

Preferably, occur extremely to forbid idle stop control in the differentiation owing to rotating and reverse, logicalCrossing the alerting drivers such as the bright light of emergency warning lamp is the illegal state of idle stop control.

In addition, in the above-described embodiment, differentiate abnormal time point starting to judge to rotate and reverse, carry out immediatelyThe alerts action of the bright light by emergency warning lamp etc., and, carry out for tackling abnormal troubleshooting, but continuingDiagnose out to rotate and reverse and judge in abnormal situation, can determine fault verification, carry out the bright light of emergency warning lamp etc.

And, for example, at the condition of internal combustion engine 101 (bent axle 120) forward (, in crankshaft rotating, the speed of a motor vehicle, internal combustionThe state that machine rotary speed rises) under, detect the pulsewidth of rotating signal POS, diagnosablely thus extremely drawn by pulsewidthIt is abnormal that rotating and reverse of rising differentiated, in this case, also can forbid crank shaft angle when stopping taking internal combustion engine asThe control that the fuel of the crank shaft angle that initial value is obtained sprays and lights a fire, or forbid idle stop control.

Label declaration

101: internal combustion engine; 104: spark plug; 114:ECU (control unit of engine); 117: crank shaft angle sensingDevice; 120: bent axle; 131: Fuelinjection nozzle; 133: cam sensor; 134: camshaft.

Claims

1. a control device for internal combustion engine, the control device of described internal combustion engine has:

Forward reversion judgement unit, it is revolving according to the output of per unit angle according to the turn-sensitive device of the bent axle of internal combustion engineRotaring signal, differentiates rotating and reverse of described bent axle; And

Stop position detecting unit, it,, according to the differentiation rotating and reverse of described forward reversion judgement unit, detects instituteCrank shaft angle when stating internal combustion engine and stopping,

The control device of described internal combustion engine is characterised in that,

The control device of described internal combustion engine has diagnosis unit, and this diagnosis unit detects with described stop position detecting unitGo out stop time crank shaft angle be that benchmark is counted described rotating signal, after the starting of estimating described internal combustion engine startsCrank shaft angle, by described turn-sensitive device after starting in the starting of described internal combustion engine exported represent be benchmark crank shaft angleWhen rotating signal by described rotating signal being counted to estimated value and the described benchmark bent axle of the crank shaft angle obtainingAngle compares, and judges that described forward reversion judgement unit has or not extremely.

2. the control device of internal combustion engine according to claim 1, wherein,

When described turn-sensitive device is the forward of described bent axle according to the rotating signal of per unit angle output and when reversionThe pulse signal that pulsewidth is different,

Described forward reversion judgement unit, according to the pulsewidth of described rotating signal, is differentiated rotating and reverse of described bent axle,

The differentiation that described stop position detecting unit rotates and reverse by basis is entered the count value of described rotating signalRow increase and decrease, detects the crank shaft angle while stopping.

3. the control device of internal combustion engine according to claim 1, wherein,

The control device of described internal combustion engine also has:

Idle stop control module, it automatically stops described internal combustion engine in the time that predefined stop condition is set up, in advanceWhen the starting conditions again of first setting is set up, automatically again start described internal combustion engine;

Startup control unit, its in the situation that described idle stop control module starts described internal combustion engine again, according toDetect taking described stop position detecting unit stop time crank shaft angle as described in the crank shaft angle control that base estimation goes outInternal combustion engine; And

Unit is forbidden in control, and it determines forward reversion judgement unit abnormal in the situation that at described diagnosis unit, forbidsControl or described startup control unit basis that described idle stop control module stops described internal combustion engine automatically stopTime the estimated value control of crank shaft angle described in the action of internal combustion engine.

4. the control device of internal combustion engine according to claim 1, wherein, described diagnosis unit is at described internal combustionThe starting of machine starts rear described turn-sensitive device and has exported and represent while being the rotating signal of benchmark crank shaft angle by describedRotating signal is counted and the estimated value of crank shaft angle that obtains and the difference of described benchmark crank shaft angle are greater than the feelings of feasible valueUnder condition, be judged to be described forward reversion judgement unit abnormal.

5. the control device of internal combustion engine according to claim 1, wherein, the control device of described internal combustion engine alsoHave warning unit, described warning unit determines the abnormal feelings of described forward reversion judgement unit at described diagnosis unitUnder condition, warning occurs abnormal.

6. the control device of internal combustion engine according to claim 1, wherein,

The crank shaft angle place that described rotating signal is preset into predetermined partly lacks,

Described diagnosis unit is according to the disappearance part of rotating signal described in the generation cycle detection of described rotating signal, to lackLose partly for benchmark is counted and detected described benchmark crank shaft angle described rotating signal.

7. a control method for internal combustion engine, in the control method of described internal combustion engine,

According to the rotating signal of per unit angle output, differentiate described bent axle according to the turn-sensitive device of the bent axle of internal combustion engineRotate and reverse,

According to the described differentiation rotating and reverse, the crank shaft angle when detecting described internal combustion engine and stopping,

The control method of described internal combustion engine is characterised in that, in the control method of described internal combustion engine,

Crank shaft angle during taking described stopping of detecting is as benchmark, after the starting of described internal combustion engine starts to described rotationSignal is counted and is estimated crank shaft angle,

Described turn-sensitive device after starting in the starting of described internal combustion engine has been exported to represent it is the rotation of benchmark crank shaft angleWhen signal, enter by estimated value and the described benchmark crank shaft angle of described rotating signal being counted to the crank shaft angle obtainingRow relatively, is judged and in the described differentiation rotating and reverse, is had or not extremely.